MESON Chess Problem Database

Problem Display
PID: 4691 (K7/8/p5N1/3P2p1/2Qpk1P1/5Rr1/2P4R/4n3 w - - 0 1)

Stahl, Karl

Allehanda for Folket, 1887

K7/8/p5N1/3P2p1/2Qpk1P1/5Rr1/2P4R/4n3

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf3
      • 2.Qe2#
    • 1...Sxf3
      • 2.Re2#
  • Tries
    • 1.Re3+?
      • 1...Kxe3
        • 2.Qe2#
      • 1...Rxe3!
    • 1.Rf4+?
      • 1...Ke3
        • 2.Re2#
        • 2.Qe2#
        • 2.Qxd4#
      • 1...gxf4!
    • 1.Qxd4+?
      • 1...Kxf3
        • 2.Se5#
        • 2.Rf2#
      • 1...Kxd4!
  • Keys
    • 1.d6!
      • threat
        • 2.Qc6#
      • 1...Kxf3
        • 2.Qe2#
      • 1...Rxf3
        • 2.Qe6#
      • 1...Sxf3
        • 2.Re2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);N_SPINP(c),S_FLIGHT,XR(C)::QAB1(D)
    • S(a);SBLOCK,XR(C)::R(B)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(d);N_SPINP(c),P-FLIGHT,XR(C)::QAR1(D)
      • Refutation
        • R(b);XR(C)
    • Try
      • R(C);CHECK
      • Refutation
        • P(e);XR(C)
    • Try
      • Q(D);CHECK,XP(c)
      • Refutation
        • K(d);P-FLIGHT,XQ(D)
  • Actual
    • P(F);
    • Threat
      • QAB(D)
    • Vars
      • K(d);N_SPINP(c),S_FLIGHT,XR(C)::QAB1(D)
      • R(b);SBLOCK,XR(C)::QAR2(D)
      • S(a);SBLOCK,XR(C)::R(B)
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